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Stomach nematodes of three sympatric species of anatid birds off the coast of Patagonia

Published online by Cambridge University Press:  02 November 2015

M.L. Agüero ,
C. Gilardoni ,
F. Cremonte  and
J.I. Diaz
M.L. Agüero
Affiliation:
Centro Nacional Patagónico (CONICET), Boulevard Brown 2915, U9120ACF, Puerto Madryn, Chubut Province, Argentina
C. Gilardoni
Affiliation:
Centro Nacional Patagónico (CONICET), Boulevard Brown 2915, U9120ACF, Puerto Madryn, Chubut Province, Argentina
F. Cremonte
Affiliation:
Centro Nacional Patagónico (CONICET), Boulevard Brown 2915, U9120ACF, Puerto Madryn, Chubut Province, Argentina
J.I. Diaz*
Affiliation:
Centro de Estudios Parasitológicos y de Vectores (CCT La Plata-CONICET-UNLP), Calle 120 s/n between 61 & 62, 1900, La Plata, Buenos Aires Province, Argentina
*
*E-mail: jidiaz@cepave.edu.ar
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Abstract

The present study focuses on the nematode community in the stomachs of three sympatric anatid bird species from the Central Patagonian coast, Argentina. The bird species include the Chubut steamer duck, Tachyeres leucocephalus, the crested duck, Lophonetta specularioides, and the black-necked swan, Cygnus melancoryphus. Up to 138 nematodes representing five species were recovered from 10 of the 13 ducks examined, with an overall prevalence of 77% and a mean intensity of 13.8. Nematodes isolated from the gizzard were Streptocara formosensis and Sciadiocara legendrei (Acuariidae) in T. leucocephalus, and Epomidiostomum vogelsangi (Amidostomatidae) in C. melancoryphus, whereas Echinuria uncinata (Acuariidae) and Tetrameres (Petrowimeres) fissispina (Tetrameriidae) were found in the proventiculus of L. specularioides. In particular, S. legendrei was registered for the first time in South America and T. leucocephalus, whereas T. fissispina represents a new record in Argentina and L. specularioides. Moreover, E. vogelsangi and E. uncinata were isolated in Patagonia for the first time. The birds studied herein are sympatric in their distribution, and two of them are syntopic breeders; however, they were infected with different parasite species. This situation could be partially due to their diet or their seasonal movements, or a combination of both. Despite the low number of hosts examined, this work enhances our knowledge about parasites from a frequently occurring group of birds on the Patagonian coast, a subject that has not been studied extensively in South America.

Type
Research Papers
Information
Journal of Helminthology , Volume 90 , Issue 6 , November 2016 , pp. 663 - 667
Copyright
Copyright © Cambridge University Press 2015 

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